Hey dear, about SS - here's what you do. You go to market place and you click on browse opportunities. You search for qualified posts by the Qual and Open buttons at the side. If both are green, you qualify. Click on any of the opps and reserve a slot. If there is one open on the spot they will directly transfer you to the submission page. If not, you just queue and wait. When an opp opens, they will send an email to you.

Try it k and let me know if you you don't understand anything. Hope to see some assignments on your blog soon!! :)